Candle Lighting Ceremony Candles and forget-me-not flowers, a symbol of the Armenian Genocide at the Ecumenical Service – Credit to: Donovan Marks Photography

The Reverend Dr. Olav Fyrse Tveit WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

The Most Reverend Dr. Katharine Jefferts Schori WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

Armenian President and Vice President Joseph Biden Attend Cathedral Ceremony WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

Candle Lighting Ceremony WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

Candle Lighting ceremony WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

s Holines Aram I Catholicos of Great House of Cilicia WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

His Holiness Karekin II WASHINGTON, DC – MAY 07: His Holiness Karekin II, Supreme Patriach and Catholicos of All Armenians speaks the National Commemoration of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

Armenian President Serzh Sargysian WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

esident Sargsyan Speaks to More than 2,000 Armenians WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

President Sargsyan, VP Joseph Biden and UN Ambassador Samantha Power WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

oubar Afeyan and U.S. Vice President Joseph Biden WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)

His Holines Karekin II Supreme Patriarch and Catholicos of All Armenians WASHINGTON, DC – MAY 07: President of Armenia, Serzh Sargsyan, and Vice President Joe Biden, attend of the Armenian Genocide Centennial (NCAGC) Ecumenical Service at Washington National Cathedral on May 7, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for NCAGC)